A Body-Floating G-Band Frequency Doubler for Astronomical Receiver in 90-nm CMOS Process

This paper presents a G-band frequency doubler in a 90-nm CMOS process for astronomical receivers is showcased. A Marchand balun is used to improve signals with opposite phases and the same amplitude and add body-floating to enhance high-frequency performance. The measurement result shows that the proposed frequency doubler achieves a -11.9 peak conversion gain with 10 dBm input power. The 3-dB bandwidth ranges from 156-196 GHz, totaling 40 GHz. with 20.5 mW power consumption. The chip size is 0.315 mm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>. This is the first attempt to apply the body-floating technique in a CMOS Frequency doubler, showing improved performance.